Integrated bypass and variable geometry configuration for an exhaust gas turbocharger

• US 6,941,755 B2
• Filed: 10/28/2003
• Issued: 09/13/2005
• Est. Priority Date: 10/28/2003
• Status: Expired due to Term

• Current Assignee: FCA US LLC (Stellantis NV)
• Original Assignee: Daimler Chrysler Corporation (Mercedes-Benz Group AG)
• Inventors: Bucknell, John R, Bayer, Ethan
• Primary Examiner(s): TRIEU, THAI BA
• Application Number:
  US10/695,338
• Publication Number:
  US 20050086936A1
• Time in Patent Office: 686 Days
• Field of Search: 606/02, 602/80, 602/84, 415/205, 415/151
• US Class Current: 60/602
• CPC Class Codes: F01D 17/146 by throttling the volute inlet of radial machines or engines
• CPC Class Codes: F01D 17/148 by means of rotatable members, e.g. butterfly valves
• CPC Class Codes: F01D 9/026 Scrolls for radial machines or engines
• CPC Class Codes: F01N 3/2006 Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating by electrically controlling the supply of combustible mixture or its constituents only F02D41/0235
• CPC Class Codes: F01N 3/28 Construction of catalytic reactors
• CPC Class Codes: F02B 37/025 Multiple scrolls or multiple gas passages guiding the gas to the pump drive
• CPC Class Codes: F02B 37/183 Arrangements of bypass valves or actuators therefor
• CPC Class Codes: F02B 37/22 by varying cross-section of exhaust passages or air passages , e.g. by throttling turbine inlets or outlets or by varying effective number of guide conduits F02B37/24 takes precedence
• CPC Class Codes: F05D 2220/40 in turbochargers
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

An exhaust gas turbocharger comprising: a twin scroll turbine housing; a turbine wheel positioned in the twin scroll housing; an exhaust gas inlet, operatively connected to port exhaust gas through each side of the twin scroll turbine housing and onto the turbine wheel; a bypass, operatively connected to the exhaust gas inlet to port exhaust gas around the twin scroll turbine housing to bypass the turbine wheel; and a valve, operatively positioned to control exhaust gas flow to each side of the twin scroll turbine housing and the bypass.

Claims

1. An exhaust gas turbocharger comprising:

a twin scroll turbine housing;

a turbine wheel positioned in said twin scroll housing;

at least two exhaust gas inlets operatively connected to port exhaust gas through each side of said twin scroll turbine housing and onto said turbine wheel;

a bypass operatively connected to port exhaust gas around said at least two exhaust gas inlets to bypass said turbine wheel; and

a valve operatively positioned to control exhaust gas flow to said at least two exhaust gas inlets and said bypass;

wherein said valve selectively blocks said at least two exhaust gas inlets on start-up to direct exhaust gas to heat a catalytic converter and said valve blocks one of said at least two exhaust gas inlets during non-start-up conditions.

2. The exhaust gas turbocharger of claim 1, where said valve is a barrel valve.

3. The exhaust gas turbocharger of claim 1, further comprising an electronic controller operationally coupled to position said valve.

4. An exhaust gas turbocharger mounted on a gasoline fueled engine, said exhaust gas turbocharger comprising:

a twin scroll turbine housing;

a turbine wheel positioned in said twin scroll housing;

at least two exhaust gas inlets operatively connected to port exhaust gas through each side of said twin scroll turbine housing and onto said turbine wheel;

a bypass operatively connected to port exhaust gas around said at least two exhaust gas inlets to bypass said turbine wheel; and

a valve operatively positioned to control exhaust gas flow to said at least two exhaust gas inlets and said bypass;

a processor configured to position said valve;

wherein said valve selectively blocks said at least two exhaust gas inlets on start-up to direct exhaust gas to heat a catalytic converter and said valve blocks one of said at least two exhaust gas inlets during non-start-up conditions.

5. The exhaust gas turbocharger of claim 4, where said valve is a barrel valve.